Sent to Earth Clinic in 2002 by Cloe Jazwinski of Los Angeles, CA. Cloe knows a thing or two about healing a bone fracture. Cloe is a 2nd Dan black belt in karate who has used comfrey salves to heal two bone fractures.
She writes, "Comfrey is one of the most well-known healing plants, especially for its ability to heal tissue and bone (due to its allantoin content, which promotes the growth of connective tissue, bone, and cartilage, and is easily absorbed through the skin). Besides broken bones, these externally poulticed leaves and roots are also used for cuts, bruises and sprains."
Recipe: Comfrey is best used fresh and simmered. Use the sticky paste to make a compress and attach it with an elastic bandage. Use every night. This will speed the healing of the fracture dramatically.
To heal her fractures, every night Cloe would grind several tablespoons of comfrey with a mortar and would bring it to a boil with a few spoons of water. She then would make a paste out of it, spread the paste on a cotton cloth, wrap it around her arm, and put elastic bands or safety pins in to secure it. Even though she had 2 fractures, Cloe decided not to wear a cast but a sling, which is why she could take off the sling at night.
Writes Cloe, "The feeling of that compress was heavenly. Even though everyone said I'd always know where my arm was broken (rain and humidity brings back the pain for the rest of your life), I never felt it and I attribute that to the comfrey compress routine. It's known to heal wounds extremely fast as well (I use a pre-made ointment of comfrey and aloe on scratches and minor wounds and they disappear overnight). I see comfrey as the crazy glue of broken bones and skin..."
Not recommended for internal use as there is some controversy about carcinogenic effects. The controversy around the use of this plant concerns its pyrrolizidine alkaloid components, which are considered carcinogenic to the liver; however, these studies have been performed on rats that were fed up to 33% of their diet in comfrey leaf. Studies done with the whole plant (rather than with isolated constituents) do not show carcinogenic effects but rather the opposite. In fact, the Japanese use comfrey vinegar extracts for treating cirrhosis of the liver.